Electrical connection and method of making the same



A ril 10v 1928. 1,665,246

" H. L. YOUNG ELECTRICAL CONNECTION AND METHOD OF MAKING THE SAME Filed March 9 1925 Patented Apr. 10, 1928.

UNITED STATES 1,665,246 PATENT OFFICE.

HARVEY L. YOUNG, 0F AKRON, OHIO, ASSIGNOR TO JOHN'R. GAMMETER, OF AKRON,

v OHIO.

ELECTRICAL CONNECTION AND METHOD OF MAKING THE SAME.

Application filed March 9, 1925.

This invention, which relates to electrical connections, has for its object the provision of a construction affording a ready means for connecting an insulated wire with a hollow conductor, in such manner that the two will be securely attached and the connection will be protected against the entrance of moisture and escape of. current from the circuit. 'The invention also includes an improved method of making electrical'connections. 7 V The invention may be used in various sitnations and .is of special value for making water-proof connections between high tension conductors and the secondary electrodes mounted on the insulating case of an ignition distributor for internal-combustion engines.

The annexed drawing and the following description set forth in detail certain means embodying my invention and certain steps constituting my improved method, such means and steps forming, however,but one of the forms in which the principle of the invention may be embodied or with which it may be carried out.

In the accompanying drawing:

Figure 1 is a front elevation, partly in section, showing a secondary distributor casing provided with tubular electrodes, forming part of a preferred embodiment of my invention;

Figure 2 is an elevation and sect-ion, showing part of the casing with an electrode and a secondary wire assembled therewith, prior to the endwise compression of the rubber insulating sheath surrounding the wire;

Figure 3 is a view similar to Figure 2, showing the wire pulled and forced inwardly to compress the sheath, and soldered to the tubular electrode;

Figure. 4 is a similar view, showing the completed connection and Figure 5 is a: perspective view, showing the inside of a distributor casing, having four connections of the type mentioned.

Referring to the accompanying drawing in which the same parts are indicated by the same respective ordinals in the several views, 10 is the casing of asecondary ignition distributor, molded of a suitable insulating material such as Bakelite and formed with four sockets 11 to receive wires 12, of either single or stranded construction, leading to the respective spark-plugs of a four-cylinder engine, and a fifth socket .13

Serial No. 13,936.

to receive the wire which leads from the secondary of the induction coil.

Aligned with each of the sockets 11 and extending from the bottom thereof, through the wall of the casing 10 and into the interior of the casing, is a tubular conductor 14.- formed with an aperture therethrough for the reception of the wire, and with a slot or hole 15 in its side to receive a drop of solder 16 for fastening the wire to the conductor.

The inner ends of the four tubular conductors 14 constitute circuit terminals which coact with the usual or any suitable form of rotor or brush mounted on the timer shaft of the engine, to distribute the high-tension current to the several spark-plugs, the current being led to the brush through a con ductor 17 which is part1 embedded in the wall of the casing 10 ant connects with the coil wire leading in through the socket 13. Each of the wires 12 is insulated with a softrubber sheath 18, and the casing 10 and outer end of the conductor 14 constitute an abutment structure for the end of said sheath.

In preparing the wire 12 to make the connection, a portion of its insulation sheath 18 p is cut and stripped off to leave a bare end of wire for insertion in the tubular conductor 14. Either before or after said stripping operation, the rubber sheath 18 is provided with a suitable binding at a predetermined distance from that end of said sheath which is to abutthe bottom of the socket 11, said distance being slightly greater than the depth of the socket 11. Thisbinding preferably takes the form, as here shown, of an endless ring or band 19 of metal having an aperture originally of a size permitting the band to be slipped over the rubber sheath 18. lVhen the band 19 has been located in the right position on the sheath, it is clamped thereon by shrinking it with a suitable compression too].

To make the connection, the insulated. wire 12, with the clamping band or binding 19 thereon. is first loosely assembled with the socket 11 and tubular conductor 14, as shown in Figure 2, the bared end of the wire 12 being passed into and through the conductor 14, with its extremity projecting slightly beyond the latter and the end of the insulating sheath 18 resting against the bottom of the socket 11. With a pair of pliers, the end of the wire 12 is then drawn further through the conductor 14, the end portion of the rubber sheath 18 slipping back on the wire and the forcing being aided, if desired, by grasping the upper part of the sheath 18 and pushing downwardly. This places that part of the sheath between its lower extremity and the clamping band 19 under endwisc compression against the bottom of the socket 11 and against the rim at the upper end of the socket, enlarging that portion of the sheath within the socket so that it fills the aperture of the socket and causing that portion of the sheath 18 which lies outside the socket, between its rim and the band 19, to assume a bulbous formation 20 which effectively seals the mouth of the socket, as indicated in Figure 3. The compression of the sheath 18 against the wire 12 by means of the clamping band 19 tends to prevent the slipping of the sheath on the wire within said band. With the sheath thus compressed and swelled within and above the socket, the end of the wire 12 is now bent over the end of the conductor 14, as indicated by the broken lines at 12 in Figure 3, to retain the parts in this relation, and the wire is fastened to the tubular conductor 14 with a drop of solder 16 applied in and through the hole 15 in the side of said conductor. The solder will generally flow along the wire, especially if the latter has been. tinned, thus making a firm connection. Finally, the projecting end of the wire is snipped away and the solder smoothed ofl, which completes the joint.

It will be observed that my invention provides a durable electrical connection, which is easily made and effectively sealed against the entrance of moisture and escape of current from the circuit.

What I claim is:

1. A member of an electrical connection comprising an insulated wire havin the end portion thereof bared, the insulation being a soft-rubber sheath on the wire, and abinding fixed on the sheath near the end thereof, leaving a portion adapted to be enlarged by longitudinal. compression between the extremity of the sheath and the binding.

2. A device according to claim 1, in which the binding is a clamping band shrunk upon the sheath.

An electrical connection comprising an abutment structure provided with an apertured conductor, a wire having a bare-d portion fastened in said conductor, an insulating, soft-rubber sheath on the wire, and av binding on the sheath near the end thereof, said sheath being enlarged by endwise compression between said binding and the abutment structure.

4. An electrical connection comprising an insulating support formed with a socket and having an apertured conductor aligned with said socket, a wire having a bared portion fastened in said. conductor, an insulating sheath on said wire and a binding on the sheath near its end, the sheath being longitudinally compressed and enlarged between said binding and the bottom of the socket so "as to fill the aperture of said socket.

5. A device according to claim 4, in which a soft-rubber sheath has the binding located thereon a short distance anterior to the rim of the socket, and the compression makes a bulbous formation in the sheath which seals the mouth of said socket.

6. An electrical connection comprising an abutment structure having a tubular conductor provided with an aperture there through and formed with a hole in its side, and a wire in said conductor, fastened therein by solder in said hole, said wire having an insulating, soft-rubber sheath heldunder compression against said abutment structure.

7. An electrical connection comprising an insulating support formed with a socket and iaving a tubular conductor aligned therewith, said conductor being formed with a hole inv its side, a wire having a bared end fastened in said conductor by solder in said hole, an insulating, soft-rubber sheath on.

said wire, and a binding on said sheath anterior to the rim of the socket,the end portion of the sheath being held under longitudinal compression between said binding and the bottom of the socket, and having a bulbous formation made by the compression therein, adjacent the binding, and sealing the mouth of the socket.

8. The method of forming a waterproof electrical connection between a soft-rubbersheathed wire and an abutment structure having an ap'ertured conductor, said method comprising the steps of stripping a portion of the wire; binding the sheath near its end, forcing the bared end of the wire into the conductor until the sheath is compressed between the binding and the abutment structure, and fastening the wire in said conductor while the sheath is thus compressed.

9. The method of forming a waterproof electrical connection between a soft-rubbersheathed wire and a socketed support which carries an apertured conductor, said. method comprising the steps of removing the sheath from the end portion of the wire, binding the sheath at a distance from its end slightly greater than the depth of. the socket, forcing the wire intosaid col'iductor until the rubber sheath is compressed against the bottom and rim of the socket sufficiently to cause it to fill the socket and assume a bulbous form between the binding and the mouth of the socket, and fastening the wire in the conductor while the sheath is thus compressed.

10. The method of forming a waterproof electrical connection between a soft-rubbersheathed wire and a socketed support carrying a side-apertured tubular conductor, said method comprising the steps of removing the socket, bending the extremity of the wire 10 over the end of the conductor to retain the parts in this relation, and fastening the Wire to the conductor by means of solder applied through the hole in the side of the conductor.

Signed by me this 28 day of February, 15

HARVEY L. YOUNG. 

